Excavator-wheel.



A. ROBERTS.

EXGAVATOR WHEEL.

APPLIOATION FILED Arms, 1911.

Patented Mar. 26, 1912.

[[EHII] U U DDIIIIII 31mm 042-295; Fade/2'3 PLANOUIAPN 60.. WASHINGTON. D. C.

ARTHUR ROBERTS, OF STREATOR, ILLINOIS.

EXCAVATOR-WHEEL.

Specification of Letters Patent.

Patented Mar. 26, 1912.

Application filed April 6, 1911. Serial No. 619,414.

'0 all whom it may concern Be it known that I, ARTHUR ROBERTS, a

V citizen of the United States, residing at Streator, .in the county of Lasalle and State of Illinois, have invented certain new and useful Improvements in Excavator-\V heels, of which the following is a specification.

This invention has relation to excavator wheels, and has for its object to provide a wheel of simple and durable structure which is especially adapted to be used for digging and elevating sand and gravel.

With this object in view the structure includes a spider mounted upon a shaft which is journaled for rotation in spring pressed boxes. Side plates are mounted upon the periphery of the spider, and at both sides thereof are spaced at their ends from each other, and each plate is provided with an outwardly disposed end portion which forms a cutter, and the said outwardly disposed portions of the plates are reinforced by bracing plates. The outwardly disposed portions of the plates at one side are staggered with relation to the outwardly disposed portions of the plates at the other side of the wheel. Shovels of peculiar configuration are mounted upon the periphery of the spider and have their major portions located between the plates at the opposite sides thereof but are provided with cutting edge portions which project beyond the edges of I the plates. Braces are provided for the said shovels.

For a full understanding of the invention reference is to be had to the following description and accompanying drawing, in which:

Figure 1 is a side elevation of the wheel;

Fig. 2 is an edge elevation of the same.

Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying drawing by the same reference characters.

The wheel consists of a central spider 1 which is fixed to the axle 2, which in turn is j ournaled in bearings 3 slidably mounted in guides 4. Coil springs 5 are inserted in the guides 4 and hear at their ends against the boxes 3 and serve as means for resiliently holding the said boxes toward the ends of the guides. The guides 1 may be mounted upon any suitable framework or a turntable, but as the framework or turntable forms no part of the present invention further description of the same is unnecessary.

Any suitable means, as for instance a sprocket wheel 6 may be mounted upon the shaft 2 for rotating the same. Plates 7 are fixed to the sides of the peripheral portion of the spider 1 and at both sides of the said spider the plates are spaced from each other at their ends forming openings 8. One end of each plate -7 is outwardly disposed, as at 9, and constitutes a cutter. The portions 9 are braced in their positions by bracing plates 10 riveted to the said portions 9 and the end portions of the plates 7.

Shovels 11 are formed from sheet metal and are of concave configuration. The said shovels are secured at one edge to the periphery of the spider 1, and the major portions of the shovels lie between the plates 7 at the opposite sides of the spider. Each shovel 11 is provided with a projecting cutting edge portion 12. Viewing the wheel from the side the shovels 11 are substantially crescent shaped in edge elevation. Viewing the wheel from the edge the projecting edge portions 12 of the shovels are provided with arcuate edges 13 the ends of which project beyond the outer sides of the plates 7 at the opposite sides of the spider 1, as at 14. Braces 15 are secured at their outer ends to the backs of the shovels 11 and at their inner ends to the peripheryof the spider 1. r V

In use the wheel as described is maintained in a state of rotation and is resiliently held against its work by the spring 5 pressing against the bearings 3. As the shovels 11 encounter the material it is scooped up and carried over the top of the wheel and dumped upon an endless belt conveyer (not shown). At the same time the plates 7 sink into the material and the outwardly disposed portions 9 thereof cut into the material and loosen the same, and direct the said loosened material through the openings 8 into the space between the plates 7 and onto the shovels 11.

Having thus described the invention, what is claimed as new is:

1. An excavator wheel, comprising a spider, plates located at the opposite sides of the periphery thereof, the plates at each side of the spider being spaced from each other at their ends forming openings, said plates having outwardly disposed portions at the said openings, and shovels attached to the periphery of the spider and located between the plates and projecting beyond the edges thereof, said shovels having portions which project over the edges of the plates beyond the outer sides thereof.

2. An excavator wheel, comprising a spider, plates located at the edges of the periphery thereof, concaved shovels secured at their edge portions to the periphery of the spider and lying between the plates, said shovels having arcuate cutting edge portions which project beyond the periphcries of the plates, said shovels also having portions which extend over the edges of the plates and project beyond the outer sides thereof.

3. An excavator, comprising a spider, plates located at the sides of the periphery thereof, concaved shovels secured at their edge portions to the periphery of the spider and lying between the plates, said shovels having arcuate cutting edge portions which project beyond the peripheries of the plates, said projecting portions also extending lat-, erally over the edges of the plates and be yond the outer sides thereof, and braces fixed at their outer ends to the. backs of the shovels and at their inner ends to the periphery of the spider.

In testimony whereof, I afiix my signature in presence of two witnesses.

ARTHUR ROBERTS.

lVitnesses RICHARD SWIFT, CHAS. JAMES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

